This method of treatment is implemented in boilers having operating pressure within 20Kgscm2 where soft & raw water are used as boiler feed water.The above treatment should be used in conjunction with polymeric sludge conditioners for better results.In this method of treatment precipitation of calcium & magnesium, either partially or completely, are induced by maintaining higher pH & higher alkalinity.The residual hardness, if present, should be controlled with the addition of polymeric sludge conditioners.